<!DOCTYPE=html>  
<html>  
<head>  
<script src="jquery-1.9.1.min.js" type="text/javascript"></script>  
</head>  
<body>  
    <div id="content" style="height:960px">
        <div id="follow">this is a scroll test;<br/>    页面下拉自动加载内容</div>
        <div style='border:1px solid tomato;margin-top:20px;color:#ac1;height:800' >hello world test DIV</div>
        
    </div>
   <!--  <div>下拉加载更多</div>  
    <div class="main" style="height:700px;overflow:auto;">  
        <div class="child" style='border:1px solid red;margin-top:20px;color:grey;height:800px' ></div>  
    </div>  --> 
</body>  
<!-- <script  type="text/javascript">  
$(document).ready(function(){  
    $(".main").unbind("scroll").bind("scroll", function(e){  
        var sum = this.scrollHeight;  
        if (sum <= $(this).scrollTop() + $(this).height()) {  
            $(".main").append($(".child").clone());  
        }  
    });  
});  
</script> -->
   <script type="text/javascript">
    $(document).ready(function(){
        var range = 50;             //距下边界长度/单位px
        var elemt = 500;           //插入元素高度/单位px
        var maxnum = 20;            //设置加载最多次数
        var num = 1;
        var totalheight = 0; 
        var main = $("#content");                     //主体元素
        $(window).scroll(function(){
            var srollPos = $(window).scrollTop();    //滚动条距顶部距离(页面超出窗口的高度)
            
            //console.log("滚动条到顶部的垂直高度: "+$(document).scrollTop());
            //console.log("页面的文档高度 ："+$(document).height());
            //console.log('浏览器的高度：'+$(window).height());
            
            totalheight = parseFloat($(window).height()) + parseFloat(srollPos);
            if(($(document).height()-range) <= totalheight  && num != maxnum) {
                main.append("<div style='border:1px solid tomato;margin-top:20px;color:#ac"+(num%20)+(num%20)+";height:"+elemt+"' >hello world"+srollPos+"---"+num+"</div>");
                num++;
            }
        });
    });
    </script>

